// Copyright 2023 EMQ Technologies Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package server

import (
	"fmt"
	"testing"
	"time"

	"github.com/stretchr/testify/require"

	"github.com/lf-edge/ekuiper/internal/topo/rule"
	"github.com/lf-edge/ekuiper/pkg/api"
	"github.com/lf-edge/ekuiper/pkg/cast"
)

func TestHandleScheduleRule(t *testing.T) {
	defer func() {
		cast.SetTimeZone(cast.GetConfiguredTimeZone().String())
	}()
	err := cast.SetTimeZone("UTC")
	require.NoError(t, err)
	now, err := time.Parse("2006-01-02 15:04:05", "2006-01-02 15:04:05")
	require.NoError(t, err)
	now = now.In(cast.GetConfiguredTimeZone())
	testcases := []struct {
		state  string
		begin  string
		end    string
		action scheduleRuleAction
	}{
		{
			state:  "Running",
			begin:  "2006-01-02 15:04:01",
			end:    "2006-01-02 15:04:06",
			action: scheduleRuleActionDoNothing,
		},
		{
			state:  rule.RuleWait,
			begin:  "2006-01-02 15:04:01",
			end:    "2006-01-02 15:04:06",
			action: scheduleRuleActionStart,
		},
		{
			state:  rule.RuleTerminated,
			begin:  "2006-01-02 15:04:01",
			end:    "2006-01-02 15:04:04",
			action: scheduleRuleActionDoNothing,
		},
		{
			state:  rule.RuleStarted,
			begin:  "2006-01-02 15:04:01",
			end:    "2006-01-02 15:04:04",
			action: scheduleRuleActionStop,
		},
	}
	for i, tc := range testcases {
		r := &api.Rule{
			Triggered: true,
			Options: &api.RuleOption{
				Cron:     "",
				Duration: "",
				CronDatetimeRange: []api.DatetimeRange{
					{
						Begin: tc.begin,
						End:   tc.end,
					},
				},
			},
		}
		scheduleRuleSignal := handleScheduleRule(now, r, tc.state)
		require.Equal(t, tc.action, scheduleRuleSignal, fmt.Sprintf("case %v", i))
	}
}

func TestRunScheduleRuleChecker(t *testing.T) {
	exit := make(chan struct{})
	go runScheduleRuleCheckerByInterval(3*time.Second, exit)
	time.Sleep(1 * time.Second)
	exit <- struct{}{}
}

func TestHandleScheduleRuleState(t *testing.T) {
	defer func() {
		cast.SetTimeZone(cast.GetConfiguredTimeZone().String())
	}()
	err := cast.SetTimeZone("UTC")
	require.NoError(t, err)
	r := &api.Rule{}
	r.Options = &api.RuleOption{}
	now, err := time.Parse("2006-01-02 15:04:05", "2006-01-02 15:04:05")
	require.NoError(t, err)
	require.NoError(t, handleScheduleRuleState(now, r, rule.RuleStarted))
	require.NoError(t, handleScheduleRuleState(now, r, rule.RuleWait))
	r.Options.CronDatetimeRange = []api.DatetimeRange{
		{
			Begin: "2006-01-02 15:04:01",
			End:   "2006-01-02 15:04:06",
		},
	}
	require.NoError(t, handleScheduleRuleState(now, r, rule.RuleStarted))
	require.NoError(t, handleScheduleRuleState(now, r, rule.RuleWait))
	r.Options.CronDatetimeRange = []api.DatetimeRange{
		{
			Begin: "2006-01-02 15:04:01",
			End:   "2006-01-02 15:04:02",
		},
	}
	require.NoError(t, handleScheduleRuleState(now, r, rule.RuleStarted))
	require.NoError(t, handleScheduleRuleState(now, r, rule.RuleWait))
}